Year	%
1992	5.67
1997	4.71
2001	5.66
2002	7.73
2003	7.14
2004	5.09
2005	5.37
2006	5.32
2007	5.56
2008	5.22
2009	5.51
2012	4.5
2013	4.5
2014	4.5
2015	5.61
2016	5.61
2017	5.93
2018	5.92
2019	5.92
2020	5.76
2021	5.77